const fs = require('fs');

fs.readFile('./1.txt', 'utf8', (error, result1) => {
	console.log(result1)
	fs.readFile('./2.txt', 'utf8', (error, result2) => {
		console.log(result2)
		fs.readFile('./3.txt', 'utf8', (error, result3) => {
			console.log(result3)

		})
	})
})